Liquid-dispensing apparatus



May 10.1927. 1.627.898 v W. T. HATMAKER ET AL LIQUID DI SPENSJINGAPPARATUS Filed June 21. 1924 2 Shanta-Sheet 1 WILLIAM T. H/lTMA/(ER.EARL E. E/CKMEYER Arfomvzx Patented ill/lay 10, 1927.

UNITED STATES PATENT OFFICE.

\VILLIAM T. HATMAKER AND EARL E. EICKMEYER, OF DAYTON, OHIO, ASSIGNORSTO THE NATIONAL RECORDING PUMP COMPANY, OF DAYTON, OHIO, A CORPORATIONOF OHIO.

LIQUID-DISPENSING APPARATUS.

Application filed June 21, 1924. Serial No. 721,485.

This invention relates to a liquid dispensing apparatus and moreparticularly to a device for controlling the connection between the pumpand the discharge line.

In liquid measuring pumps and more especially in measuring pumps of thepiston type there is a tendency on the part of the column, of liquid tocontinue its movement after the piston, or other discharge devlce,

has completed its operative movement or delivery stroke, this being dueto the inertia of the column of liquid. During the delivery stroke ofthe piston of a piston pump the column of liquid moves at a considerablevelocity and when the piston is suddenly stopped at the end of itsdelivery stroke the column of liquid will continue its movement untilthe inertia is overcome by gravity and friction and consequently thereoften a material over-delivery of liquid.

The main object of the present invention is to provide means "forinterrupting the flow of liquid from the pump casing to the dischargeline immediately upon the completion of the delivery of a predeterminedquantity of such liquid.

I Tothis end it is a further object of this invention to provide means,the operation of which is controlled by the piston, to cause theconnection between the pump cylinder and the discharge line to beinterrupted at the end of the delivery stroke of the piston.

A further object of the invention is to provide such a device which willbe simple in its construction, positive in its operation and which willnot in any way interfere with the normal operation of the dispensingapparatus. I I

Other objects of the invention will appear as the device is described indetail.

In the accompanying drawings Fig. 1 is a side elevation of a dispensingapparatus, with the casing in section, showing our in' vention appliedthereto; Fig; 2 is a transverse section taken on the line 2--2 of Fig.1; Fig. 3 is a vertical section taken on the line 33 of Fig. 2; Fig. ais a vertical section taken on the line 4-4 of Fig. 3; Fig. 5 is adetail view of the rotatable valve member; and F ig. 6 is a detail viewof the connecting member.

In these drawings we have illustrated one embodiment of our inventionand have shown the same as applied to a double cylinder gasolinedispensing pump of a well single casting or cylinder head These pistonsare connected with and ac tuated by piston rods l to which movement maybe imparted in any suitable manner.

Means are provided for connecting both cylinders with a discharge line5. In the present instance, this discharge line is connccted with thecylinders through a manually operated valve 6 which controls a bypassbut inasmuch as thisby-pass forms no part oi. the presentinvention it isnot shown in detail or described herein and the by-pass valve 6 may bedisregarded in the consideration of the controlling device as it is'normally in a position to directly connect the discharge line with thecylinders. Between each cylinder and the discharge line is a suitablecut-oil to control the flow of liquid from the cylinder to the dischargeline. In the present construction, we have utilized a single cut-elf tocontrol the connection between both cylinders and the discharge line.This cut-oil may be of any suitable character and may be controlled inany suitable manner which will cause the connection between eithercylinder and the discharge line to be interrupted immediately upon thecompletion or" the delivery stroke of the piston in that cylinder. Inthe present apparatus the upper ends of the cylinders l are closed by 7which is provided. with a cavity or chamber 8 in line with therespective cylinders, the two chambers in the cylinder head or castingbeing separated by a partition The connection between the discharge lineand the cylinders is, in the present instance, formed through thispartition and, in the device here shown,

we have utilized a rotary valve as the controlling element. Therefore,we have formed in the partition 9 a cylindrical valve chamber 10 havingports 11 connecting the same with the respective cylinders 1 and havinga port 12 connecting the same with the discharge line, through thebypass valve (3. l-totatably mounted in the. valve chamber is a hollowvalve member 13 which is provided with a series of ports let soarrangg'etl that the rotation of the valve will cause the corn ncctionbetween the discharge line and one or the other of the cylindcrr-i to beinterrupted. lo the. present Ct struction the ar rangement of the portst ls such that when one cylinder is disconnected troni the dischargeline the other cylinder will be connected there vith.

The cut-oft or rotatable valve may be actuated in any suitable manner toautomatically interrupt the connection betweei'i one ot the cylindersand the discharge line when the piston in that cylinder has completedits delivery stroke. thereby interrupting the flow of liquid andpreventing; overdelivery. In the present form of the apparatus theactuating; devices are mounted in the cylinder head at. the upper endsof the respective cylinders and are controlled by the respectivepistons. lrete'ably each actuating device is in the form of an arm 15pivotally supported. within the cylinder heath operatively connectedwith the valve and having a part arranged to be engaged by the piston ora part connected therewith, to actuate the arm and the valve. in theparticular form oi actuating arm here shown, the outer or pivoted end otthe arm is bitiircated and the parts 16 ot the bifurcated portion of thearm extend on opposite sides of the piston rod 4 and are provided withopenings to receive trunnions 17 which are mounted in suitable bearings18 arranged within the cylinder head. It desired, the bearings 18 may beformed in a bracket or hearing frame 19 which is removably mounteo inthe cylinder head by means of screws 20 extending through the same intolugs 21 depending); trom the outer wall of the cylinder head. Thepurpose of this arrangement. is to enable the bearings for the trunnions17 to to termed without the necessity ot boring though the side walls ofthe cylinder heae. The actuating, arm 15 is provided with a partarranged to be engaged by the piston 3, or the partcarried thereby. justbefore that piston completes its delivery stroke so that the valve willbe closed at the time the piston com.- pletes its delivery stroke. Thatpart ot the arm which is engaged by the piston is spaced some distancefrom that end of the arm which is connected wi h the valve andconsequently a very slight movement of the piston will effect anoperative movement of the valve member. In the presentconstruction theactuating: arm is provided with two depending lugs 52-2 between which isrotatably supported a roller 23 which is arranged to be engaged by thepiston. or a part connected therewith, and serves to minimize thefrictional contact between the arm and the piston. As hero shown, thepart which engages the roller and imparts movement to the actuating armis in the form of a cam which may be connected either with the piston orwith the piston rod and, in the present instance, is connected with bothparts and t ornisa part ot the piston. In the term illustrated, the camis shown at 31 in the form 0!. a projection forming a part of the pistonand extending upwardly from the piston head and having a tapered upperportion with which the piston. rod is connected and which provides a camsurt'ace tor the projectitm. That portion or" the projection between thecam surtare and the piston head is cylindrical and of sutticient lengthto permit the amount ot movement which will be imparted to the piston byeach stroke of the piston rod to be regulatei'l without. varying themovement or" the valve.

The actuating arm may be connected with the valve member in any suitablemanner but, in the present arrangement, the valve mcn'iber 1.3terminates some distance from the rear end of the chamber 10. Rotatablymounted in the rear portion of the chamber 10 a connecting member orcylindrical block 2% which i spaced from the rear closed end of thevalve member 153 and is connected separably but non-rotatably therewith.in the presentinstance, this connection formed by an axial pin ortrunnion 25, extending! into both the connecting memher and valvemember, and by a dowel pin 26 also extending into both of said members,thus holdingthe same against relative rotation. That face of theconnectmember adjacent to the valve men her is provided on oppositesides of its ccnte' with recesses 27 into which extend projections orrollers 28 extending laterally from the respective actuating arms 15,the :n'rangement of the recesses being: such that the projections 28 canhave a slight radial movement relative to the connecting memher as thelatter is rotated. The. arms 1.5 extend through. slots 29 in theadjacent sides ot the partition. or walls of the valve chamber 10. Theouter or front end of the valve chamber is closed by a cap 30 which isscrew threaded into that chamber and serves both to close the chamberand to hold the valve member against axial displacement. By removing;the cap 30 the valve member may be withdrawn from the valve chamber without displacing the actuating arms 15;, which will maintain their normalconnections with the connecting member 20. When the valve aember isreinserted in the chamber the axial pin 25 will enter the correspondingopening and it is only necessary to so position the valve that the dowelpin will enter its opening, thus enabling' the valve to be character inwhich an over-delivery of liquid,

at U

due to inertia of the column of the liquid, is positively prevented;thatthe apparatus for accomplishingthis result is very simple i n itsconstruction, is positively operated by the piston itself and does notin any way interfere with the normal operation of the dispensingapparatus.

W'hile we have shown and described one embodiment of our invention wewish it to be understood that we do nottlesire to be limited to thedetails thereof as various modifications may appear to a person skilledin the art.

Having now fully described our invention, what we claim as new anddesire to secure by Letters Patent, is: l i

1. In a dispensing apparatus, a cylinder, a piston mounted in saidcylinder, means for actuating said piston, a discharge line con nectedwith said cylinder, a cut-off to'control said connection, and meanssupported independently of said cut-otf'for automat ically closing saidcut-off when a predetermined quantity of liquid has been discharged fromsaid cylinder.

2. In a dispensing apparatus, a cylinder, a piston mounted in saidcylinder, means tor actuating said piston, a discharge line connectedwith said cylinder, a cut-oil to control said connection, and meanssupported independently of said cut-oil for automatically closing saidcut-oft at the end of the delivery stroke of said piston.

23. In a dispensing apparatus, a cylinder, a piston mounted in saidcylinder, means for actuating said piston, a discharge line connectedwith said cylinder, a cut-0E to con trol said connection, and a devicesupported independently of said cut-0ft and controlled by said piston toactuate said cutoff.

l. In a dispensing apparatus, a cylinder, a piston mounted in saidcylinder, means for actuating said piston, a discharge line connectedwith said cylinder, a valve interposed bet-ween said discharge line andsaid cylinder, and. an actuating device for said valve supported.independently thereof and arranged to be operated by said piston.

5. In a dispensing apparatus, a cylinder, a piston mounted in saidcylinder, means for actuating said piston, a discharge line connectedwith said cylinder, a valve interposed bet-ween said cylinder and saiddischarge line, an actuating device for said valve mounted independentlyof said valve at one end of said cylinder and having a part adapted tobe engaged by said piston to cause said valve to be actuated.

6 In a dispensing apparatus, a cylinder, a piston mounted-in saidcylinder, means for actuatingsaid piston, a discharge line connected.with said cylinder, a valveinterposed between said discharge line andsaid cylinder, an arm pivotally mounted on a lixed' support at one endof said cylinder, operatively connected with said valve and having partextending into the path of said piston.

7. In adispensing apparatus, a cylinder, a hollow cylinder head, apiston mounted in said cylinder, means foractuating said piston, adischarge line connected with said cylinder,a valve interposed betweensaid discharge line and said. cylinder, and an actuatim device for saidvalve mounted in said hollow cylinder head independently of said valveand controlled by said piston.

8. In a dispensing apparatus, a cylinder, a

hollow cylinder head, a piston mounted in said cylinder, means foractuating said piston,a discharge line connected with said cylinder, avalve interposed between said discharge line and said cylinder, and anactuating device'pivotally mounted within said cylinder head, having apart operatively connected with said valve and having a part arranged inthe path ofsaid piston.

9. In a dispensing apparatus, a cylinder, a hollow cylinder head, apiston mounted in said cylinder, means for actuating said piston, adischarge line connected with said cylinder, a valve interposed betweensaid discharge line and said cylinder, an actuating device having oneend operatively connected with said valve, having its other endpivotally mounted within the hollow cylinder head and having a partarranged between the ends thereof and adapted to be engaged by saidpiston.

10. In a dispensing apparatus, a cylind r, a hollow cylinder head,apiston mounted in said cylinder, means for actuating said piston, adischarge line connected with said cylinder, a rotatable valveinterposed between said cylinder and said discharge line, an actuatingdevice mounted in said hollow cylinder head, operatively connected withsaid rotatable valve and having apart arranged to beactuated by saidpiston,

11. In a dispensing apparatus, a cylinder head having a valve chamber, adischarge chamber connected with said valve chamber, a valve, rotatablymounted in said valve chamber, a piston mounted in said cylinder, andmeans for actuating said piston, and an arm pivotally mounted withinsaid cylinder head, operatively connected with said rotatable valve andhaving a part arranged to be engaged by said piston.

12. In a dispensing apparatus, a pair of cylinders, an end memberconnected with both cylinders and having chambers in line with therespective cylinders, a partition separating said chambers and having avalve I (if) lift.)

chamber "formed therein and communicating with both of said cylinders, adischarge line communicating with said valve chamber, a valve rotatablymounted in said valve chamber, actuating devices mounted in therespective chambers in said casing independently of said valve and eachoperatively connected with said valve, pistons mounted in the respectivecylinders and adapted to actuate the respective valve actuating devices,and means for actuating said pistons.

13. In. a dispensing apparatus, a cylinder, a cylinder head having anelongated valve chamber communicating with said cylinder, a dischargeline communicating with said valve chamber, a piston mounted in saidcylinder, means for actuating said piston, a valve rotatably mounted insaid valve chamber, a connecting member rotatably mounted in saidchamber and having operative connection with said valve, and anactuating device operatively connected with said connecting member andhaving a part arranged to be engaged by said piston.

14. In a dispensing apparatus, a cylinder, a cylinder head'having anelongated valve chamber communicating with said cylinder, a dischargeline communicating with said valve chamber, a piston mounted in saidcylinder, means for actuating said piston, a valve rotatably mounted insaid valve chamber, a connecting member rotatably mounted in said valvechamber in axial alinement with said valve, means for detachablyconnecting said connecting member with said valve, said connectingmember being spaced from the adjacent end of said valve and having arecess in that face thereof adjacent to said valve, and an actuatingdevice pivotally mounted in said cylinder head, having a part adapted toenter the recess in said connecting member and having a part arranged tobe engaged by said piston.

15. In a dispensing apparatus, a cylinder, a hollow cylinder head, apiston mounted in said cylinder, means for actuating said piston, adischarge line connected with said cylinder, a valve to control theconnection between said discharge line and said cylinder, a bearingbracket arranged within said cylinder head and secured to the end wall.thereof and having alined bearings arranged near the oppositesides ofsaid cylinder head, an actuating arm having one end bifurcated to extendon opposite sides of said piston rod and provided with trunnions mountedin said bearings, means for operatively connecting the other end of saidarm with said valve, said arm also having a part arranged in the path ofsaid piston.

16. In a dispensing.apparatus, a cylinder, a piston mounted in saidcylinder, means for actuating said piston, a discharge line connectedwith said cylinder, a cut-off to control said connection, and a devicesupported independently of said cut-off to actuate said cut-off, saidpiston having a part arranged to impart movement to said actuatingdevice. 17. In a dispensingapparatus, a cylinder, a piston mounted insaid cylinder, means for actuating said piston, a discharge lineconnected with said cylinder, a cut-0E to control said connection, adevice to actuate said cut-oil, and a cam connected with said piston,having a part to impart operative movement to said actuating device andanother part to retain said actuating device in the position to which.it has been moved during the further movement of said piston.

18. In a dispensing apparatus, a cylinder, a piston mounted in saidcylinder, means for actuating said piston, a discharge line connectedwith said cylinder, a cut-01f to control said connection, a device toactuate said cutbft, and a part carried by said piston to impartmovement to said actuating device, said part having a cam shaped portion and also having a straight portion between said cam shaped portionand said piston.

19. In a dispensing apparatus, a cylinder, a piston mounted in saidcylinder, means for actuating said piston, a discharge line connectedwith said cylinder, a cut-off to control said connection, a device toactuate said cut-ofi', a'cylindrical projection carried by said pistonand having a tapered end portion connected with said piston rod andarranged to en a c said actuating device.

Int?

20. In a dispensing apparatus, a cylinder,

a piston mounted in said cylinder, a piston rod connected with saidpiston, a cam carried by one of said parts, a discharge line connectedwith said cylinder, a cut-off to control the last mentioned connection,and an actuating device for said cut-off having a part arranged to beengaged by said cam.

In. testimony whereof, we aflix our signatures hereto. 1

WILLIAM 'l. HA-TMAKER. EAR-L E. EICKMEYER.

